TY - GEN
T1 - 240-Clamped PWM in Three Phase Grid-Connected PV Converter Application
AU - Qamar, Hafsa
AU - Qamar, Haleema
AU - Ayyanar, Rajapandian
N1 - Funding Information:
This work made use of facility supported by the National Science Foundation Industry-University Collaborative Research Center for Efficient Vehicles and Sustainable Transportation Systems under Award No. IIP-1624842.
Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - This paper presents the control scheme for a two-stage, grid connected Photovoltaic (PV) inverter that uses a low-loss PWM method called 240-Clamped PWM (240CPWM) in the DC-AC stage. The main advantage of using 240CPWM is that it results in at least 86% less switching loss with similar THD as compared to conventional space vector PWM (CSVPWM). In a typical grid connected PV converter with conventional PWM methods, the DC-DC stage is responsible for Maximum Power Point Tracking (MPPT) and DC-AC stage controls the DC link voltage and injects sinusoidal currents into the grid. With 240CPWM in the inverter, DC-DC stage can no longer track the MPP because it needs to control the DC link voltage dynamically in a six-pulse pattern. So, the DC-AC stage is designed to track the MPP with an outer slower loop and control the grid currents accordingly with an inner faster loop. Simulation and experimental results with a 10-kW prototype are shown with THD close to 5% and efficiency of the DC-AC stage with 240CPWM greater than 99%.
AB - This paper presents the control scheme for a two-stage, grid connected Photovoltaic (PV) inverter that uses a low-loss PWM method called 240-Clamped PWM (240CPWM) in the DC-AC stage. The main advantage of using 240CPWM is that it results in at least 86% less switching loss with similar THD as compared to conventional space vector PWM (CSVPWM). In a typical grid connected PV converter with conventional PWM methods, the DC-DC stage is responsible for Maximum Power Point Tracking (MPPT) and DC-AC stage controls the DC link voltage and injects sinusoidal currents into the grid. With 240CPWM in the inverter, DC-DC stage can no longer track the MPP because it needs to control the DC link voltage dynamically in a six-pulse pattern. So, the DC-AC stage is designed to track the MPP with an outer slower loop and control the grid currents accordingly with an inner faster loop. Simulation and experimental results with a 10-kW prototype are shown with THD close to 5% and efficiency of the DC-AC stage with 240CPWM greater than 99%.
KW - 240-Clamped PWM (240CPWM)
KW - Maximum Power Point Tracking (MPPT)
KW - Photovoltaic (PV)
KW - THD
KW - conventional space vector PWM (CSVPWM)
KW - switching loss
UR - http://www.scopus.com/inward/record.url?scp=85123380066&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85123380066&partnerID=8YFLogxK
U2 - 10.1109/ECCE47101.2021.9595349
DO - 10.1109/ECCE47101.2021.9595349
M3 - Conference contribution
AN - SCOPUS:85123380066
T3 - 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings
SP - 340
EP - 346
BT - 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 13th IEEE Energy Conversion Congress and Exposition, ECCE 2021
Y2 - 10 October 2021 through 14 October 2021
ER -